US4401137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming fabric seam and method of producing
Assignee: Albany International Corp
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Filing: 1979-10-18
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Granted: 1983-08-30
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Expires: 1999-10-18
Abstract
Abstract A forming fabric for papermaking machines is produced by weaving a conventional fabric with warp yarns extending from each of two ends. A selected number of extended warps are cut with each having an adjacent extending warp. Loops are formed with the extending warps and the ends of extending warps are rewoven through provided fills to a position near the cut warps and leaving ends of the warps projecting from the surface of the fabric. The loops are interlaced and a join pin inserted. The projecting ends are pulled to collapse the loops about the join pin.
Inventors
- 👤 Frederick W. Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0054; D03; D03D; D03D3/00; D03D3/04; Y; Y10; Y10S; Y10S162/00; Y10S162/904
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
The method of producing a forming fabric for use in a papermaking machine which includes the steps of weaving a fabric having a warp and a weft system, forming loops at each of two ends of the fabric by extending selected warp yarns, and providing a tail portion of each loop forming warp projecting from the surface of the fabric whereby said loops may be interlaced with a joining pin through said loops to form an endless belt and said tail portions pulled causing the loops to collapse around the joining pin.
Claim 2
Independent Claim
92 words
The method of producing a forming fabric for use in a papermaking machine which includes the steps of weaving a fabric having a warp and a weft system, forming loops at each of two ends of the fabric by extending selected warp yarns, and providing a tail portion of each loop forming warp projecting from the surface of the fabric whereby said loops may be interlaced with a joining pin through said loops to form an endless belt and said tail portions pulled causing the loops to collapse around the joining pin.
Claim 3
Independent Claim
90 words
The method of producing a forming fabric for use in a papermaking machine which includes the steps of weaving a fabric having a warp and a weft system, forming loops at each of two ends of the fabric by extending selected warp yarns, providing a tail portion of each loop forming warp extending from the surface of the fabric, interlacing said loops, inserting a joining pin through the interlaced loops to form an endless belt, and pulling said tail portions to cause the loops to collapse around the joining pin.
Claim 4
Independent Claim
90 words
The method of producing a forming fabric for use in a papermaking machine which includes the steps of weaving a fabric having a warp and a weft system, forming loops at each of two ends of the fabric by extending selected warp yarns, providing a tail portion of each loop forming warp extending from the surface of the fabric, interlacing said loops, inserting a joining pin through the interlaced loops to form an endless belt, and pulling said tail portions to cause the loops to collapse around the joining pin.
Claim 5
Dependent Claim
25 words
The method of producing a forming fabric in accordance with claim 2 in which after collapse of the loops the tail portions are trimmed off.
Claim 6
Dependent Claim
40 words
The method of producing a forming fabric in accordance with claim 3 in which after formation the belt is treated in the area adjacent the pin to increase the strength of the seam and ensure binding of the warp threads.
Claim 7
Dependent Claim
41 words
The method of producing a forming fabric in accordance with claim 3 in which after formation the belt is chemically treated in the area adjacent the pin to increase the strength of the seam and ensure binding of the warp threads.
Claim 8
Dependent Claim
41 words
The method of producing a forming fabric in accordance with claim 3 in which after formation the belt is ultrasonically treated in the area adjacent the pin to increase the strength of the seam and ensure binding of the warp threads.
Claim 9
Dependent Claim
43 words
The method of producing a forming fabric in accordance with claim 3 in which after formation the belt is treated by microwave radiation in the area adjacent the pin to increase the strength of the seam and ensure binding of the warp threads.
Claim 10
Independent Claim
77 words
The method of producing a fabric which includes the steps of forming loops by extending threads of the fabric at two ends thereof and providing a tail portion of each of the threads so extended with the tail portion projecting from the surface of the fabric whereby said loops may be interlaced with a joining pin through said loops to form an endless belt and said tailportions pulled causing the loops to collapse around the joining pin.
Claim 11
Independent Claim
77 words
The method of producing a fabric which includes the steps of forming loops by extending threads of the fabric at two ends thereof and providing a tail portion of each of the threads so extended with the tail portion projecting from the surface of the fabric whereby said loops may be interlaced with a joining pin through said loops to form an endless belt and said tailportions pulled causing the loops to collapse around the joining pin.
Claim 12
Independent Claim
72 words
The method of producing a fabric which includes the steps of forming loops by extending threads of the fabric at two ends thereof, providing a tail portion of each of the threads so extended projecting from the surface of the fabric, interlacing the loops, inserting a joining pin through the interlaced loops to form an endless belt and pulling the tail portions to cause the loops to collapse around the forming pin.
Claim 13
Independent Claim
72 words
The method of producing a fabric which includes the steps of forming loops by extending threads of the fabric at two ends thereof, providing a tail portion of each of the threads so extended projecting from the surface of the fabric, interlacing the loops, inserting a joining pin through the interlaced loops to form an endless belt and pulling the tail portions to cause the loops to collapse around the forming pin.
Claim 14
Independent Claim
52 words
the method of producing a forming fabric for use in a papermaking machine comprising the formation of loops of sufficient size to be easily laced together on each end of a fabric, interlocking the loops and inserting a joining pin and reducing the diameters of the loops to form a seam area.
Claim 15
Independent Claim
52 words
the method of producing a forming fabric for use in a papermaking machine comprising the formation of loops of sufficient size to be easily laced together on each end of a fabric, interlocking the loops and inserting a joining pin and reducing the diameters of the loops to form a seam area.
Claim 16
Dependent Claim
58 words
The method of producing a forming fabric in accordance with claim 10 in which the loops are formed of threads of the fabric and an end of the thread of each group is allowed to project from the fabric prior to joining and the diameter of each of said loops is reduced by pulling each respective projecting end.
Claim 17
Independent Claim
72 words
The method of producing a fabric to be used as a forming fabric in a papermaking machine which includes the steps of forming loops by extending threads of the fabric at two ends thereof and providing a tail portion of each of the threads so extended with the tail portion projecting from the surface of the fabric and treating said loops to provide the planes thereof at right angles to the fabric.
Claim 18
Independent Claim
72 words
The method of producing a fabric to be used as a forming fabric in a papermaking machine which includes the steps of forming loops by extending threads of the fabric at two ends thereof and providing a tail portion of each of the threads so extended with the tail portion projecting from the surface of the fabric and treating said loops to provide the planes thereof at right angles to the fabric.
Claim 19
Dependent Claim
80 words
The method of producing a fabric in accordance with claim 12 in which after treating said loops are interlaced, a join pin is inserted through said interlaced loops to form an endless belt, the tail portions are pulled causing the loops to collapse around the join pin and reduce the open area around the pin and a further treatment is provided to increase the strength of the seam and ensure the binding of the warp threads in the vicinity thereof.
Claim 20
Dependent Claim
103 words
The method of producing a fabric in accordance with claim 10 in which during the process of loop formation fill yarns are removed from the end of the fabric; warp yarns adjacent to the intended loop warp are severed close to the remaining woven fabric; fill yarns are interwoven from the end of the woven fabric to a position in the vicinity of the forming pin; extending warp yarns are looped around the forming pin and woven back through the fills to a position near the severed warps where tails of the loop warp are left projecting from the surface of the fabric.
Claim 21
Dependent Claim
23 words
The method of producing a fabric in accordance with claim 14 in which the adjacent warp yarns are severed before removing the fills.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |